Real-Time Variable Monitoring in IAR IDE for Cortex-R52 MPU

Below is a simple solution:

Figure 1 Setting AXI-AP port in IAE IDE

Since the IDE can directly access the SRAM range via AXI-AP, variables defined in the system RAM can be tested for real-time monitoring. Customers can modify the *.icf file, placing the variables to be observed in the real-time monitoring window in the system RAM area.

Figure 2 Set code to start from RAM area

Variables defined in the TCM area cannot be monitored in real time directly. However, an offset of 0x2000_0000 needs to be added to the access address. Real-time monitoring is performed through the address of the variable symbol for real-time reading and updating. When variables are defined in the TCM area, the debugger can read from the TCM via AXI-AP, but AXI-AP requires an address offset to access the TCM, hence the real-time monitoring window cannot be updated directly.

Figure 3 CPU0 TCM address offset via AXIS

First, customers need to manually modify the *.ddf file and make the debugger recognize the TCM via AXIS area as a valid address area, as shown in Figure 4:

Figure 4 Modifying *.ddf file in IAE IDE

Then, indirectly display the variables stored in TCM in real time through an intermediate pointer variable, which obtains the address and offset of the variable. For example: the variable “var” is defined in the TCM area. If the user wants to view “var” in real time, they should add the expression “&var+0x20000000/4” to configure “var” to the mirrored area of AXIS. 0x20000000 is the offset between the AXIS access area and the TCM area. 0x20000000/4 is used because the data type length of “var” is 32 bits.